Kinase, in vitro: 

An enzyme-substrate reaction that occurs in non-living experimental conditions such as a test tube. For example, a purified enzyme is reacted with a substrate protein or mixture of proteins or peptides.

AMPKA1 S81-p
AMPKA2 S81-p
 Putative in vivo kinases: 

An enzyme-substrate reaction that occurs within living cells; includes cultured cells, ex vivo samples, and intact organisms. In the case of kinases, the large number of protein kinases in intact cells makes exact identification of the responsible kinase challenging.

AMPKA1 S81-p
ERK2 S81-p
Regulatory protein:
leptin S81-p
A-769662 S81-p
acadesine S81-p
compound_C S81-p
insulin S86-p , S98-p , T154-p
LPA S83-p , T89-p
PDGF S81-p
siRNA S81-p